August in Yakima averages a daily high of 31.5°C with nights around 12.2°C. Rain is rare — about 2.4 wet days and 5.6mm across the month. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Yakima is May–June.
Based on YAKIMA AIRPORT, WA US (4.8km), 1995–2024. 30 years of August data.